What is this thing? A green & white pendant of some sort was found in my stocking 18 years ago. No one knows where it came from.

What is this thing? A green & white pendant of some sort was found in my stocking 18 years ago. No one knows where it came from.
Answer: It’s a jadeite pendant with a space to hold herbs or sandalwood. The word on the back is “fu” which means “luck”.